Running bunco for 17
For 17 players you will need 4 tables, 12 dice (three a table), a bell for the head table, and 5 sheets of paper for the score cards (four to a page). With 16 or 20 players nobody would sit out.
This is a mixer chart: instead of winners moving to the head table, everyone follows the chart so you play with as many different people as possible. Partners sit across. Roll for 21 as usual; when the head table calls the round, mark a win or loss and any buncos on your card and find your next seat.
Some bunco groups fill empty seats with a "ghost" instead, and the ghost's partner rolls for both. This chart rests 1 player each round instead, so every score on the night is a real one.
Sit-outs can't come out exactly even over 12 rounds: 5 people never sit out and the rest sit out once. Play 17 rounds if you want everyone to sit out the same number of times.
Each score card lists that player's table, partner and opponents for every round. Want names on them, a different number of rounds or a fresh shuffle? Open this chart in the planner.